package com.android.core.utils.glide;

import android.content.Context;
import android.content.res.Resources;  
import android.graphics.Bitmap;  
import android.graphics.BitmapShader;  
import android.graphics.Canvas;  
import android.graphics.Paint;  
import android.graphics.RectF;  
  
import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;  
import com.bumptech.glide.load.resource.bitmap.BitmapTransformation;  
  
/** 
 * Description: 
 * User: chenzheng 
 * Date: 2016/8/31 0031 
 * Time: 15:42 
 */  
public class GlideRoundTransform extends BitmapTransformation {  
  
    private static float radius = 0f;  
  
    public GlideRoundTransform(Context context) {  
        this(context, 4);  
    }  
  
    public GlideRoundTransform(Context context, int dp) {  
        super(context);  
        this.radius = Resources.getSystem().getDisplayMetrics().density * dp;
    }  
  
    @Override protected Bitmap transform(BitmapPool pool, Bitmap toTransform, int outWidth, int outHeight) {  
        return roundCrop(pool, toTransform);  
    }  
  
    private static Bitmap roundCrop(BitmapPool pool, Bitmap source) {  
        if (source == null) return null;  
  
        Bitmap result = pool.get(source.getWidth(), source.getHeight(), Bitmap.Config.ARGB_8888);  
        if (result == null) {  
            result = Bitmap.createBitmap(source.getWidth(), source.getHeight(), Bitmap.Config.ARGB_8888);  
        }  
  
        Canvas canvas = new Canvas(result);  
        Paint paint = new Paint();  
        paint.setShader(new BitmapShader(source, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP));  
        paint.setAntiAlias(true);  
        RectF rectF = new RectF(0f, 0f, source.getWidth(), source.getHeight());
        canvas.drawRoundRect(rectF, radius, radius, paint);  
        return result;  
    }  
  
    @Override public String getId() {  
        return getClass().getName() + Math.round(radius);  
    }  
}  